ANSWER Hi Sam. All 4-series of this dryer series uses a thermistor which has 2 pnk. wires to it part # 307208. It is located in the blower housing. At the bottom side of the lint tray housing, there are 2- blue wires which go to the sensor bars which feed the control board info. Close to it is a green ground wire that connects the front inner tumbler panel grounded to the sensor bar screw. It is part # Y303711. The sensor bar assy. is part # 33001809. Thank You.